A nodule (of limestone, ironstone, etc.) having the form of a flattened sphere appearing in cross-section to be divided by septa or cracks typically…
| 单词 | θ5837 |
| 释义 | the world > the earth > structure of the earth > constituent materials > stone > a stone > [noun] > concretionary or nodular > septarium (4) septarium1748 A nodule (of limestone, ironstone, etc.) having the form of a flattened sphere appearing in cross-section to be divided by septa or cracks typically… turtle-stone1851 = septarium, n. (from the markings on section resembling those of a tortoiseshell). beetle-stone1859 = septarium, n.. cement-stone1863 a nodule of argillaceous limestone occurring embedded in clay, from which cement is made. |
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